Red Hat Bugzilla – Bug 186044
Graphical installer cannot be used with flatpanel displays
Last modified: 2007-11-30 17:11:27 EST
Description of problem:
When graphical installation starts the X server, it uses vertical refresh rates
beyond the flat panel capabilities, at least with ViewSonic VP171b-2. The flat
panels generally top out below 85 Hz, and the X server is started at vertical
freq above 85 Hz. Therefore, only text mode installation is possible with flat
Version-Release number of selected component (if applicable):
Steps to Reproduce:
linux resolution=1280x1024 worked with my flat panel now. That should not be
Unfortunately, we generally can't probe a lot of useful information in a generic
fashion for LCDs. What's the output of ddcprobe?
The monitor displays frequences as 'Out Of Range, H.Frequency: 54 kHz,
V.Frequency 86.6 Hz'. Sometimes it goes to 86.9 Hz. I am using DVI. Below is
Videocard autoprobe results
Description: (C) 1988-2003, ATI Technologies Inc. R430
Memory (MB): 16
Monitor autoprobe results
Horizontal Sync (kHZ): 30-82
Vertical Sync (HZ) : 50-85
Width (mm): 340
I had the same problem installing FC5 on an Acer Travelmate 4100.
Looks like we need to use Option "DDCMode" "on", but only in some cases.
Investigating when to do that and when not.
This should be better in the next build.